DS
1185
89.2
Model
No Page
AIR CONDITIONING, FIT TING INSTRUCTION
(PT94--- cabin) 30.07.1999
15(28)
28.06.1999
6000---8750
6250Hi---8950Hi
--- Note! Drier hoses are connected immediately
before filling.
FILLING UP WITH REFRIGERANT: OBSERVE
ALL SAFETY PRECAUTIONS WHEN FILLING!
--- Check that all unions are tightened. NOTE! After
filling with refrigerant the compressor oil plug
must never be unscrewed, as refrigerant w ill
then spray out.
--- Air a nd moisture can be removed from the sys -
tem by vacuum pumping. This is carried out
from the compressor service valves ”SUC” and
”DIS”. Flush the system w ith refrigerant while
vacuum pumping so that moisture a nd air are
fully removed from the system. (Vacuum---pump
for 45 minutes, allowing a small amount of
refrigerant to flow into the installation, and then
continue pumping for 15 minutes).
--- Filling is carried out in gaseous state through
service valve SUC on the suction side with com-
pressor running (or in liquid state through ser -
vice valve DIS on the pressure side, when t he
engine must not be running).
There is about 1,4 kg refrigerant in the system
--- Drier 32515500: When the system has func-
tioned about 10 min refrigerant in the inspection
glass must be almost transparent. Some
bubbles can be seen when engine rotation
speed is changed.
--- When the filling hoses are removed from the
compressor after filling, the hose union must be
pressed against the service valve while turning
the nut so that no refrigerant escapes.
CHECKING:
--- Carry out pressure measurements after filling.
Normal pressure values at outdoor temperature
of 20---25˚C and at engine revs1500 r/min: (max
cooling, fan speed II).
Low pressure reading: 50---300 kPa
High pressure reading: 700---1400 kPa
Deviating pressures and fault analysis, see Service Manual.
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